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authorRich Felker <dalias@aerifal.cx>2011-02-12 00:22:29 -0500
committerRich Felker <dalias@aerifal.cx>2011-02-12 00:22:29 -0500
commit0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 (patch)
tree6eaef0d8a720fa3da580de87b647fff796fe80b3 /src/math/__fpclassifyl.c
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initial check-in, version 0.5.0v0.5.0
Diffstat (limited to 'src/math/__fpclassifyl.c')
-rw-r--r--src/math/__fpclassifyl.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/math/__fpclassifyl.c b/src/math/__fpclassifyl.c
new file mode 100644
index 00000000..4f93bef1
--- /dev/null
+++ b/src/math/__fpclassifyl.c
@@ -0,0 +1,16 @@
+#include <stdint.h>
+#include <math.h>
+
+/* FIXME: move this to arch-specific file */
+int __fpclassifyl(long double __x)
+{
+ union {
+ long double __ld;
+ __uint16_t __hw[5];
+ __uint64_t __m;
+ } __y = { __x };
+ int __ee = __y.__hw[4]&0x7fff;
+ if (!__ee) return __y.__m ? FP_SUBNORMAL : FP_ZERO;
+ if (__ee==0x7fff) return __y.__m ? FP_NAN : FP_INFINITE;
+ return FP_NORMAL;
+}